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Microstructure and properties of novel Al-Ce-Sc, Al-Ce-Y, Al-Ce-Zr and Al-Ce-Sc-Y alloy conductors processed by die casting, hot C extrusion and cold drawing
Wang, Weiyi; Pan, Qinglin; Lin, Geng; Wang, Xiaoping; Sun, Yuqiao; Wang, Xiangdong; Ye, Ji; Sun, Yuanwei; Yu, Yi; Jiang, Fuqing; Li, Jun; Liu, Yaru
2020-12-01
Source PublicationJOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
Volume58Pages:155-170
AbstractIn order to overcome the trade-off between the strength and electrical conductivity of aluminum alloy conductors, the new Al-Ce-Sc, Al-Ce-Y, Al-Ce-Zr and Al-Ce-Sc-Y alloys were prepared by die casting, high temperature homogenization treatment, hot extrusion and cold drawing. Adding Sc and Y eliminated the dendrite segregation of the as-cast Al-0.2Ce alloy and promoted the formation of equiaxed grains with the average grain size of 142.5 pin. The Al-0.2Ce-0.2Sc-0.1Y alloy inherited the great tensile properties of Al-0.2Ce-0.25c alloy and the high electrical conductivity of Al-0.2Ce-0.1Y alloy simultaneously. After cold drawing and annealing at 200 degrees C for 5 h, the ultimate tensile strength of Al-0.2Ce-0.2Sc-0.1Y alloy reached 200 MPa and 198 MPa, the elongation reached 6.8 % and 8.5 %, and the electrical conductivity reached 61.01 % and 61.77 %, respectively. The main second phase of Al-0.2Ce-0.25c-0.1Y alloy after hot extrusion were Al13Fe3Ce containing a few Y and Si atoms. The larger size and proportion of the second phase greatly reduced the concentration of solute Fe and Si atoms and the addition of Y significantly decreased the density of defects after cold drawing compared to Al-0.2Ce-0.2Sc alloy, which improved electrical conductivity of the alloy. Furthermore, the dispersed and coherent nano-size Al3Sc precipitions of Al-0.2Ce-0.25c-0.1Y alloy greatly improved strength, elongation and heat resistance. Compared with Al-0.2Ce-0.25c alloy, the lower density of dislocation, stacking fault and subgrain boundary and the larger size of Al3Sc precipitions with enrichment of Y atoms enable the Al-0.2Ce-0.25c-0.1Y alloy to maintain high strength, elongation and electrical conductivity after annealing. (C) 2020 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
DOI10.1016/j.jmst.2020.03.073
WOS IDWOS:000574648800020
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/82330
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Wang, Weiyi,Pan, Qinglin,Lin, Geng,et al. Microstructure and properties of novel Al-Ce-Sc, Al-Ce-Y, Al-Ce-Zr and Al-Ce-Sc-Y alloy conductors processed by die casting, hot C extrusion and cold drawing[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2020,58:155-170.
APA Wang, Weiyi.,Pan, Qinglin.,Lin, Geng.,Wang, Xiaoping.,Sun, Yuqiao.,...&Liu, Yaru.(2020).Microstructure and properties of novel Al-Ce-Sc, Al-Ce-Y, Al-Ce-Zr and Al-Ce-Sc-Y alloy conductors processed by die casting, hot C extrusion and cold drawing.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,58,155-170.
MLA Wang, Weiyi,et al."Microstructure and properties of novel Al-Ce-Sc, Al-Ce-Y, Al-Ce-Zr and Al-Ce-Sc-Y alloy conductors processed by die casting, hot C extrusion and cold drawing".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 58(2020):155-170.
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